Publication

Application

Priority

DE 19922020 A 19990512

Abstract (en)

New bridged metallocene compounds based on Sub-Group III, IV, V or VI metals. The new bridged metallocene compounds are of formula (I). M<1> = Sub-Group III, IV, V or VI metal; R<7> = H, Si(R<12>)3 or a 1-30C carbon-containing group, or two or more groups R<7> and the linking carbon atoms may form an optionally substituted 4-24C ring system; R<12> = H or a 1-40C carbon-containing group; R<8> = H, Si(R<12>)3 or 1-30C carbon-containing groups which, with the cyclopentadienyl ring, can form aza-, thia- or phospha-pentalenes, or two or more groups R<8> and the linking carbons may form a ring system as above; l, m = 5 with v = 0, or 4 with v = 1; L<1> = H, 1-10C hydrocarbyl, halogen, OR<9>, SR<9>, OSi(R<9>)3, Si(R<9>)3, P(R<9>)2, N(R<9>)2, toluenesulfonyl, trifluoroacetyl, trifluoroacetoxy, trifluoromethanesulfonyl, nonfluorobutanesulfonyl or 2,2,2-tri-fluoroethanesulfonyl; R<9> = halogen, 1-10C alkyl or haloalkyl, 6-20C aryl or haloaryl; o = 1-4; Z = bridging element; v = 0 or 1. Independent claims are also included for: (1) a catalyst systems containing (I) and cocatalyst(s); and (2) a process for the production of polyolefins by polymerization of olefin(s) in presence of (I).